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【单选题】
下面哪种情况说发生了海水入侵？（）A.
海水以楔状体插入到含水层的底部
B.
海水楔向向进退有序
C.
海水压力大于陆地含水层的水头压力
D.
海水楔向向不断前进
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举一反三
【单选题】It's time for . [ ]
A.
to have lunch
B.
have lunch
C.
having a lunch
D.
me to have lunch
【单选题】He often has _____ _____ eleven o'clock. [ ]
A.
the lunch, on
B.
lunch, about
C.
a lunch, in
D.
lunch, at
【单选题】单项选择。 It's time _______. [ ]
A.
for lunch
B.
to lunch
C.
to have a lunch
D.
for a lunch
【单选题】It's _____. Let's go together. [ ]
A.
lunch's time
B.
lunch time
C.
time lunch
D.
time to lunch
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